The Donnachie-Landshoff pomeron and gauge invariance

Abstract

The pomeron model of Donnachie and Landshoff does not conserve the electromagnetic current when applied to diffractive reactions such as electroproduction of a quark-antiquark pair or of a vector meson. We propose a treatment of this problem which ensures a physical behaviour of cross sections in the photoproduction limit and show that it leads to results rather similar to those obtained from two-gluon exchange.

arXiv comment15 pages with 2 postscript figures

Cited by in corpus (2)

• The QCD description of diffractive processes
• Exclusive diffractive photon bremsstrahlung at the LHC